Question

A sample of 9.85 g of solid calcium hydroxide is added to 30.5 mL of 0.380 M aqueous hydrochloric acid.

Write the balanced chemical equation for the reaction. Physical states are optional.
What is the limiting reactant?
How many grams of salt are formed after the reaction is complete?
How many grams of the excess reactant remain after the reaction is complete?

Answer 1

Step-by-step explanation:

Balanced chemical equation: Ca(OH)2(s) + 2HCl(aq) → CaCl2(aq) + 2H2O(l).

Limiting reactant: To find out, calculate the number of moles of each reactant.

Grams of salt formed: Calculate the moles of the limiting reactant, then use stoichiometry to find the moles of salt formed, and finally convert to grams.

Grams of excess reactant remaining: Calculate the moles of the limiting reactant, then use stoichiometry to find the moles of excess reactant consumed, and finally subtract from the initial moles of the excess reactant to find how many moles (and then grams) remain.